SHACKELFORD E40B

Oil · District 08 · Lease #54546

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

421k BBL

Cum Gas

1.6M MCF

casinghead

Wells

1

Production

2020-04 — 2026-04

Peak Month

2021-12

Production History

Cum Oil: 420,895 BBL Cum Gas: 1,556,067 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

19,916 BBL/mo

Di (annual)

64.9%

b-factor

0.1

EUR

409,224 BBL

R-squared

0.904

type

hyperbolic

Operator History (from monthly production reports)

2020-04 — 2026-07 PIONEER NATURAL RES. USA, INC. 76 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
102HPIONEER NATURAL RES. USA, INC.110,3252019-11-14